參數(shù)資料
型號: ST92186B3BK
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP32
封裝: PLASTIC, SDIP-32
文件頁數(shù): 124/148頁
文件大?。?/td> 1664K
代理商: ST92186B3BK
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
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ST92186B - STANDARD TIMER (STIM)
STANDARD TIMER (Cont’d)
7.2.5 Register Description
COUNTER HIGH BYTE REGISTER (STH)
R240 - Read/Write
Register Page: 11
Reset value: 1111 1111 (FFh)
Bits 7:0 = ST.[15:8]:
Counter High-Byte.
COUNTER LOW BYTE REGISTER (STL)
R241 - Read/Write
Register Page: 11
Reset value: 1111 1111 (FFh)
Bits 7:0 = ST.[7:0]:
Counter Low Byte.
Writing to the STH and STL registers allows the
user to enter the Standard Timer constant, while
reading it provides the counter’s current value.
Thus it is possible to read the counter on-the-fly.
STANDARD TIMER PRESCALER REGISTER
(STP)
R242 - Read/Write
Register Page: 11
Reset value: 1111 1111 (FFh)
Bits 7:0 = STP.[7:0]:
Prescaler.
The Prescaler value for the Standard Timer is pro-
grammed into this register. When reading the STP
register, the returned value corresponds to the
programmed data instead of the current data.
00h: No prescaler
01h: Divide by 2
FFh: Divide by 256
STANDARD
TIMER
CONTROL
REGISTER
(STC)
R243 - Read/Write
Register Page: 11
Reset value: 0001 0100 (14h)
Bit 7 = ST-SP:
Start-Stop Bit.
This bit is set and cleared by software.
0: Stop counting
1: Start counting
Bit 6 = S-C:
Single-Continuous Mode Select.
This bit is set and cleared by software.
0: Continuous Mode
1: Single Mode
Bits 5:3 = Reserved.
Must be kept in reset state.
Bit 2 = INTS:
Interrupt Selection.
0: Standard Timer interrupt enabled
1: Standard Timer interrupt is disabled and the ex-
ternal interrupt pin is enabled.
Bits 1:0 = Reserved.
Must be kept in reset state.
70
ST.15 ST.14 ST.13 ST.12 ST.11 ST.10 ST.9
ST.8
70
ST.7
ST.6
ST.5
ST.4
ST.3
ST.2
ST.1
ST.0
70
STP.7 STP.6 STP.5 STP.4 STP.3 STP.2 STP.1 STP.0
70
ST-SP
S-C
0
1
0
INTS
0
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